/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.trino.plugin.deltalake;

import com.google.inject.Inject;
import io.trino.spi.connector.BucketFunction;
import io.trino.spi.connector.ConnectorNodePartitioningProvider;
import io.trino.spi.connector.ConnectorPartitioningHandle;
import io.trino.spi.connector.ConnectorSession;
import io.trino.spi.connector.ConnectorTransactionHandle;
import io.trino.spi.type.Type;
import io.trino.spi.type.TypeManager;
import io.trino.spi.type.TypeOperators;

import java.util.List;

public class DeltaLakeNodePartitioningProvider
        implements ConnectorNodePartitioningProvider
{
    private final TypeOperators typeOperators;

    @Inject
    public DeltaLakeNodePartitioningProvider(TypeManager typeManager)
    {
        this.typeOperators = typeManager.getTypeOperators();
    }

    @Override
    public BucketFunction getBucketFunction(
            ConnectorTransactionHandle transactionHandle,
            ConnectorSession session,
            ConnectorPartitioningHandle partitioningHandle,
            List<Type> partitionChannelTypes,
            int bucketCount)
    {
        if (partitioningHandle instanceof DeltaLakeUpdateHandle) {
            return new DeltaLakeUpdateBucketFunction(bucketCount);
        }

        DeltaLakePartitioningHandle handle = (DeltaLakePartitioningHandle) partitioningHandle;
        return new DeltaLakeBucketFunction(typeOperators, handle.partitioningColumns(), bucketCount);
    }
}
